Extended linear metal–metal interactions in an anionic rhodium(I) complex. X-Ray structure of NMe4[Rh(ox)(CO)2](ox = oxalato)

Abstract

The complex NMe₄[Rh(ox)(CO)₂](2)(ox = oxalato) was prepared from NMe₄[Rh(ox)(cod)](1)(codcyclo-octa-1,5-diene) by bubbling carbon monoxide and, complex (1) was prepared from Rh₂Cl₂(cod)₂, oxalic acid, and NMe₄OH; the solid state structure of (2) consists of infinite chains of metal atoms [Rh ⋯ Rh ⋯ Rh 175.01(3)°] with equal rhodium–rhodium distances of 3.243(1)Å, the shortest distance found in a stacked rhodium complex.